setElementVelocity (veh, vx+(((velX/3)*(-1))/50), vy+(((velY/3)*(-1))/50), vz+(((velZ/3)*(-1))/50) ) 
                bullet = createProjectile(veh, 21, muzzleX, muzzleY, muzzleZ, 1, nil, 255,255,255, velX, velY, velZ) 
 im using tank projectile and projectile id its 21